package com.itheima.reggie.controller;

import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.baomidou.mybatisplus.extension.plugins.pagination.Page;
import com.itheima.reggie.common.R;
import com.itheima.reggie.entity.Employee;
import com.itheima.reggie.service.EmployeeService;
import lombok.extern.slf4j.Slf4j;
import org.apache.commons.lang.StringUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.util.DigestUtils;
import org.springframework.web.bind.annotation.*;

import javax.servlet.http.HttpServletRequest;
import java.time.LocalDateTime;

@Slf4j
@RequestMapping("/employee")
@RestController
public class EmployeeController {

    @Autowired
    private EmployeeService employeeService;

    @PostMapping("/login")
    public R<Employee> login(HttpServletRequest request, @RequestBody Employee employee) {

        //1. 将页面提交的密码password进行md5加密处理, 得到加密后的字符串
        String password = employee.getPassword();
        String password5D = DigestUtils.md5DigestAsHex(password.getBytes());

        //2. 根据页面提交的用户名username查询数据库中员工数据信息
        LambdaQueryWrapper<Employee> queryWrapper = new LambdaQueryWrapper<Employee>();
        queryWrapper.eq(Employee::getUsername, employee.getUsername());// 比较两者是否相等
        Employee emp = employeeService.getOne(queryWrapper);

        //3. 如果没有查询到, 则返回登录失败结果
        if (emp == null) {
            return R.error("登陆失败，账号不存在");
        }
        //4. 密码比对，如果不一致, 则返回登录失败结果
        if (!emp.getPassword().equals(password5D)) {
            return R.error("密码错误，请重试！");
        }
        //5. 查看员工状态，如果为已禁用状态，则返回员工已禁用结果
        if (emp.getStatus() == 0) {
            return R.error("此账户处于禁用状态，请联系管理员！");
        }
        //6. 登录成功，将员工id存入Session, 并返回登录成功结果
        request.getSession().setAttribute("employee", emp.getId());
        return R.success(emp);
    }

    /**
     * 退出
     *
     * @param request
     * @return
     */
    @PostMapping("/logout")
    public R<String> logout(HttpServletRequest request) {
        //A. 清理Session中的用户id
        request.getSession().removeAttribute("employee");
        //B. 返回结果  泛型不再是 employ  而是 string
        return R.success("退出成功");
    }

    @PostMapping
    public R<String> save(HttpServletRequest request, @RequestBody Employee employee) {
        log.info("添加员工，员工信息{}", employee.toString());
        //设置初始默认密码 123456， 并对密码进行MD5加密。
        employee.setPassword(DigestUtils.md5DigestAsHex("123456".getBytes()));
        //在组装员工信息时, 还需要  "封装 " 创建时间、修改时间，创建人、修改人信息(从session中获取当前登录用户)。
        // employee.setCreateTime(LocalDateTime.now());
        //employee.setUpdateTime(LocalDateTime.now());

        //从session获取创建人，修改人的信息
        //获取当前登录用户的id
        //long empid = (long) request.getSession().getAttribute("employee");
        //employee.setCreateUser(empid);
        //employee.setUpdateUser(empid);
        //将封装好的对象上传到网页
        employeeService.save(employee);

        return R.success("新增员工成功");
    }

    /**
     * 员工分页查询实现
     *
     * @param page     当前页码数
     * @param pageSize 每页展示信息数
     * @param name     员工姓名
     * @return
     */
    @GetMapping("/page")
    public R<Page> page(int page, int pageSize, String name) {

        log.info("page={},pageSize={},name={}", page, pageSize, name);
        //A. 构造分页条件
        Page pageInfo = new Page(page, pageSize);
        //B. 构建搜索条件 - name进行模糊匹配  构造器
        LambdaQueryWrapper<Employee> queryWrapper = new LambdaQueryWrapper();
        //过滤条件
        queryWrapper.like(StringUtils.isNotEmpty(name), Employee::getName, name);
        //C. 构建排序条件 - 更新时间倒序排序
        queryWrapper.orderByDesc(Employee::getUsername);
        //D. 执行查询
        employeeService.page(pageInfo, queryWrapper);
        //E. 组装结果并返回
        return R.success(pageInfo);
    }

    /**
     * 员工信息修改，根据id
     * @param request
     * @param employee
     * @return
     */
    @PutMapping
    public R<String> update (HttpServletRequest request, @RequestBody Employee employee){
        log.info(employee.toString());

        long empId = (long) request.getSession().getAttribute("employee");

        //employee.setUpdateTime(LocalDateTime.now());
        //employee.setUpdateUser(empId);
        employeeService.updateById(employee);
        return R.success("员工信息修改成功");
    }

    @GetMapping("/{id}")
    public R<Employee> getById(@PathVariable Long id){
        log.info("根据id查询员工信息");

        Employee employee = employeeService.getById(id);
        if(employee!= null){
            return R.success(employee);
        }
        return R.error("查无信息");
    }
}
